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3 years ago

What is this question?? (needing help)

Mathematics

2 answers:

Free_Kalibri [48]3 years ago

5 0

468 x 0.001 = 0.468

46.8 x 0.1 = 4.68

4.68 x 10^3 = 4680

0.468 x 10^2 = 46.8

Hope this helps!

Sav [38]3 years ago

4 0

0.468 is the right answer on the first part. First you multiply without the decimal point, and then put the decimal point as the answer. And it gave us, $468*1=468$ , or therefore, the answer has three decimal places. And it gave us the answer is 0.46768 is the right answer. 4.68 is the right answer on the second part.  You can also multiply without the decimal point, and then put the decimal point it's going to be the answer. And it gave us, $468*1=468$ , or therefore, the answer it has two decimal places and the answer is 4.68 is the right answer. 4680 is the right answer on the third part. First you had to multiply by the exponents, and it gave us, $10^3=10*10*10=1000*4.68$ . Multiply by the numbers, and it gave us the answer is $4.68*1000=4680$ , or 4680 is the right answer. 46.8 is the right answer on the last part. First you had to multiply by the exponents, and it gave us, $10^2=10*10=100*0.468$ . Then you multiply by the numbers, and it gave us, $0.468*100=46.8$ , and it gave us the answer is 46.8 is the right answer. Hope this helps! And thank you for posting your question at here on brainly, and have a great day. -Charlie

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g If the economy improves, a certain stock stock will have a return of 23.4 percent. If the economy declines, the stock will hav

dusya [7]

Answer:

$E(X) = 23.4* 0.67 -11.9*0.33= 11.759 \%$

Now we can find the second central moment with this formula:

$E(X^2) = \sum_{i=1}^n X^2_i P(X_i)$

And replacing we got:

$E(X^2) = (23.4)^2* 0.67 +(-11.9)^2*0.33= 413.5965$

And the variance is given by:

$Var(X) = E(X^2) - [E(X)]^2$

And replacing we got:

$Var(X) = 413.5965 -(11.759)^2 =275.5105$

And finally the deviation would be:

$Sd(X) = \sqrt{275.5105}= 16.599 \%$

Step-by-step explanation:

We can define the random variable of interest X as the return from a stock and we know the following conditions:

$X_1 = 23.4 , P(X_1) =0.67$ represent the result if the economy improves

$X_2 = -11.9 , P(X_1) =0.33$ represent the result if we have a recession

We want to find the standard deviation for the returns on the stock. We need to begin finding the mean with this formula:

$E(X) = \sum_{i=1}^n X_i P(X_i)$

And replacing the data given we got:

$E(X) = 23.4* 0.67 -11.9*0.33= 11.759 \%$

Now we can find the second central moment with this formula:

$E(X^2) = \sum_{i=1}^n X^2_i P(X_i)$

And replacing we got:

$E(X^2) = (23.4)^2* 0.67 +(-11.9)^2*0.33= 413.5965$

And the variance is given by:

$Var(X) = E(X^2) - [E(X)]^2$

And replacing we got:

$Var(X) = 413.5965 -(11.759)^2 =275.5105$

And finally the deviation would be:

$Sd(X) = \sqrt{275.5105}= 16.599 \%$

7 0

2 years ago

2. In a recent survey conducted by the International Nanny Association, 4,176 nannies were placed in a job in a given year. Only

Natali [406]

Answer:

There is a 0.57% probability that a randomly selected nanny who was placed during the last year is a male nanny (a "mannie").

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

In this problem, we have that:

Desired outcomes:

The number of male nannies selected. 24 of the nannies placed were men. So the number of desired outcomes is 24.

Total outcomes:

The number of nannies selected. 4,176 nannies were placed in a job in a given year. So the number of total outcomes 4176.

Find the probability that a randomly selected nanny who was placed during the last year is a male nanny (a "mannie").

$P = \frac{24}{4176} = 0.0057$

There is a 0.57% probability that a randomly selected nanny who was placed during the last year is a male nanny (a "mannie").

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3 years ago

-2x + 4 = 14 show all work

umka21 [38]

Answer:

x=-5

-2x + 4 = 14

-4 = 14-4

-2x=10

-2/-2=10/-2=-5

x=-5

Step-by-step explanation:

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3 years ago

An employee at a gift shop earns $72.00 for working 9 hours. At this hourly rate, what should the employee earn for a 40-hour wo

ZanzabumX [31]

Answer:

The employee would earn $320 for a 40-hour work week.

Step-by-step explanation:

Given

Total Earning amount = $72.00

Total Time taken = 9 hours

To determine

We have to find the employee's earning earn for a 40-hour work week.

First Step

Determining the hourly rate

In order to determine the hourly rate, the first step we need to do is to divide the earning amount by the total number of hours.

Hourly rate = Total Earning amount / Total Time taken

= $72.00 / 9 hours

= $8.00 per hour

Second Step

Determining the employee's earning earn for a 40-hour work week.

As we have already determined that employee is earning $8.00 per hour.

i.e.

Hourly rate = $8.00 per hour

In order to determine the employee's earning for a 40-hour work week, all we need is to multiply the hourly rate i.e. 8 with 40.

Thus,

Earning for 40-hour work week = Hourly rate × 40

= 8.00 × 40

= $320

Therefore, the employee would earn $320 for a 40-hour work week.

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3 years ago

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kobusy [5.1K]

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|3x - 2| = 16
3x + 2 = 16
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2 years ago